As animal bones pop up around Villefranche, Laurène and Bertrand assemble a team to scour the woods, and the Children of Arduinna prepare their attack.

With the squad hobbled and the Celtic day of the dead looming, Laurène begs a commander for reinforcements. Dogs lead the way to another body.

As Laurène desperately tries to escape the ravine and get help for Teddy Bear, memories of her kidnapping surface. Siriani makes a troubling discovery.

Laurène stumbles on a surreal crime scene near a piano in the forest. Cora searches for clues to Roman's fate. Garnier digs up info on Siriani's past.

As the full moon sends the town into a frenzy, Hermann grapples with ghosts from his past, and Siriani seizes a chance to inspect the quarry.

A bizarre bee attack leads to a grisly discovery at a pond. Laurène takes Jonas into custody to find out what he knows about the figure in the forest.

While Teddy Bear combs through the latest victim's Super 8 footage, Laurène returns to the library to research ancient Celtic rituals.

Laurène cuts her sick leave short to investigate the murder of a quarry worker. In flashbacks to 57 B.C., a Roman expedition takes a harrowing turn.